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ICS950703 Datasheet

  • ICS950703

  • PROGRAMMABLE TIMING CONTROL HUB FOR P4

  • 24頁(yè)

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS950703
Programmable Timing Control Hub
TM
for P4
TM
Recommended Application:
Intel Tehema and Tehema-E Chipsets
Output Features:
鈥?/div>
4 Differential CPU Clock Pairs @ 3.3V
鈥?/div>
2 - 3V MREF clocks for memory reference seeds,
(separate single ended but 180 degrees out of phase)
鈥?/div>
4 - 66MHz 3V66 output
鈥?/div>
10 - 3V 33MHz PCI clocks
鈥?/div>
2 - 48MHz clocks (180 degrees out of phase)
鈥?/div>
2 - 14.318 reference output (180 degrees out of phase)
Key Specifications:
鈥?/div>
3V66 Output jitter <300ps
鈥?/div>
CPU Output Jitter <200ps
鈥?/div>
MREF Output jitter <250ps
Features/Benefits:
鈥?/div>
QuadRom
TM
frequency selection.
鈥?/div>
Programmable asynchronous 3V66/PCI frequency.
鈥?/div>
Programmable output frequency.
鈥?/div>
Programmable output divider ratios.
鈥?/div>
Programmable output rise/fall time.
鈥?/div>
Programmable output skew.
鈥?/div>
Programmable spread percentage for EMI control.
鈥?/div>
Programmable watch dog safe frequency.
鈥?/div>
Support I
2
C Index read/write and block read/write
operations.
鈥?/div>
Uses external 14.318MHz reference input.
Frequency Table
Bit4
Sel133/100
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Bit3
FS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Bit2
FS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Bit1
FS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Bit0
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
MHz
90.00
100.00
100.90
103.00
105.00
108.00
110.00
112.00
115.00
118.00
120.00
122.00
125.00
127.00
130.00
133.60
120.00
133.33
133.90
136.00
138.00
140.00
142.00
144.00
145.00
148.00
150.00
152.00
154.00
156.00
158.00
160.00
MREF
MHz
45.00
50.00
50.45
51.50
52.50
54.00
55.00
56.00
57.50
59.00
60.00
61.00
62.50
63.50
65.00
66.80
60.00
66.67
66.95
68.00
69.00
70.00
71.00
72.00
72.50
74.00
75.00
76.00
77.00
78.00
79.00
80.00
PCI
MHz
30.00
33.33
33.63
34.33
35.00
36.00
36.67
37.33
38.33
39.33
40.00
40.67
41.67
42.33
43.33
44.53
30.00
33.33
33.48
34.00
34.50
35.00
35.50
36.00
36.25
37.00
37.50
38.00
38.50
39.00
39.50
40.00
3V66
MHz
60.00
66.67
67.27
68.67
70.00
72.00
73.33
74.67
76.67
78.67
80.00
81.33
83.33
84.67
86.67
89.07
60.00
66.67
66.95
68.00
69.00
70.00
71.00
72.00
72.50
74.00
75.00
76.00
77.00
78.00
79.00
80.00
Pin Configuration
GND 1
MULTSEL0/REF0 2
MULTSEL1/REF1 3
VDDREF 4
X1 5
X2 6
GNDREF 7
PCICLK0 8
PCICLK1 9
VDDPCI 10
PCICLK2 11
GNDPCI 13
PCICLK4 14
PCICLK5 15
VDDPCI 16
PCICLK6 17
**FS2/PCICLK7 18
GNDPCI 19
**FS3/PCICLK8 20
**SEL100_133#/PCICLK9 21
VDDPCI 22
SDATA 23
GND48 24
*FS0/48MHz_0 25
**FS1/48MHz_1 26
AVDD48 27
PD# 28
56-SSOP
56 VDDMREF
55 3VMREF
54 3VMREF_B
53 GNDMREF
52 SCLK
51 CPUCLKT3
50 CPUCLKC3
49 VDDCPU
48 CPUCLKT2
47 CPUCLKC2
46 GNDCPU
ICS950703
PCICLK3 12
45 CPUCLKT1
44 CPUCLKC1
43 VDDCPU
42 CPUCLKT0
41 CPUCLKC0
40 GNDCPU
39 IREF
38 AVDD
37 GND
36 VDD3V66
35 3V66_3
34 3V66_2
33 GND3V66
32 GND3V66
31 3V66_1
30 3V66_0
29 VDD3V66
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
0690D鈥?5/14/04

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